Motorola APX 7000 Detailed Service Manual

5-14 Troubleshooting Charts: Power-Up Failure
Power-Up Failure – Low VCC_SW_1.875 Voltage
Low VCC_SW_1.875
Voltage
Measure Radio
Current
Is Standby
Current more
than 15mA above
Average
Board has a short,
Replace VOCON
Yes
Measure SW_B+
Voltage at R6549
Voltage =
SW_B+
Proceed to
Incorrect B+
Voltage
Measure Voltage
at R6431 on
VCC_5.0A Side
4.8 < V < 5.2?
Proceed to Low
LDO8 VCC_5.0A
Voltage Flow
Chart
Are Parts Solder
Connections and
Placement Correct
Replace or Repair
Part/s
Replace VOCON
Board
No
No
Yes
Yes
No
Measure Voltage
at R6431 on
BGAP_COMP
Side
2.2 < V < 2.7?
Measure Voltage
at R6420
2.2 < V < 2.7?
Replace VOCON
Board
Inspect and Repair
U6409 and
Supporting
Circuitry
Inspect U6508 and
All Supporting
Circuitry
No
Yes
Yes
No
No
Yes

Motorola APX 7000 Specifications

General

Digital Technology	P25 Phase 1 and Phase 2
Emergency Button	Yes
Frequency Range	136-174 MHz (VHF), 380-470 MHz (UHF Range 1), 450-520 MHz (UHF Range 2), 764-870 MHz (700/800 MHz)
Display	Color LCD
Encryption	AES, DES
Water Resistance	IP67
GPS	Yes
Bluetooth	Yes
Operating Temperature	-30°C to +60°C
Weight	391 g (with standard battery)